class RegistrationViewController: UIViewController, UITableViewDelegate, UITableViewDataSource, KeyboardDisplayChangeProtocol {

    public enum FormField: String {
        case name = "Name"
        case surname = "Surname"
        case age = "Age"
        case email = "Email"
        case telephone = "Telephone"
        case username = "Username"
        case password = "Password"
    }

    @IBOutlet weak var tableView: KBTableView!
    var formFields: [FormField] = []

    override func viewDidLoad() {
        super.viewDidLoad()

        addFormFields()
        tableView.estimatedRowHeight = 60
        tableView.rowHeight = UITableViewAutomaticDimension
        tableView.tableFooterView = UIView(frame: .zero)
    }

    func addFormFields() {
        formFields.append(.name)
        formFields.append(.surname)
        formFields.append(.age)
        formFields.append(.email)
        formFields.append(.telephone)
        formFields.append(.username)
        formFields.append(.password)
    }

    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        addKeyboardObserver(on: view)
    }

    override func viewWillDisappear(_ animated: Bool) {
        removeKeyboardObserver()
        super.viewWillDisappear(animated)
    }

    func removeKeyboardObserver() {
        tableView.removeKeyboardObserver()
    }

    func addKeyboardObserver(on view: UIView) {
        tableView.addKeyboardObserver(on: view)
    }

    func tableView(_ tableView: UITableView, heightForFooterInSection section: Int) -> CGFloat {
        return 0
    }

    func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return formFields.count
    }

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = self.tableView.dequeueReusableCell(withIdentifier: CustomCell.identifier) as? CustomCell

        let formField = formFields[indexPath.row]
        cell?.configure(title: formField.rawValue)

        return cell!
    }
}